package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     * @param employeeDTO
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        //对象属性拷贝
        BeanUtils.copyProperties(employeeDTO, employee);

        //设置密码，默认密码123456
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));

        //设置账号的状态，默认正常状态 1表示正常 0表示锁定
        employee.setStatus(StatusConstant.ENABLE);

        //设置当前记录的创建时间和修改时间
        /*employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateTime(LocalDateTime.now());

        employee.setCreateUser(BaseContext.getCurrentId());
        employee.setUpdateUser(BaseContext.getCurrentId());*/

        employeeMapper.insert(employee);
    }

    /**
     * 员工分页查询
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult pagequery(EmployeePageQueryDTO employeePageQueryDTO) {
        /*
            分页查询的主要步骤：
                1.设置分页的参数：页码和每页记录数
                2.执行分页查询（调用mapper接口的方法）注意返回值必须为Page类型
                3.封装需要返回的类型，可以通过调用Page的getTotal和getResult方法
         */

        //分页查询，第一个参数是页码，第二个参数是每页记录数
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());
        //pagehelper要求返回值固定为Page类型
        Page<Employee> page = employeeMapper.pagequery(employeePageQueryDTO);
        long total = page.getTotal();
        List<Employee> records = page.getResult();

        return new PageResult(total, records);

    }

    /**
     * 启用禁用员工账号
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, long id) {
        Employee employee = Employee.builder()
                .status(status)
                .id(id)
                .build();

        employeeMapper.update(employee);
    }

    /**
     * 根据id查询员工信息
     * @param id
     * @return
     */
    @Override
    public Employee getById(Integer id) {
        Employee employee= employeeMapper.getById(id);
        return employee;
    }

    /**
     * 编辑员工信息,更改员工
     * @param employeeDTO
     */
    @Override
    public void update(EmployeeDTO employeeDTO) {

        Employee employee = new Employee();
        //对象属性拷贝
        BeanUtils.copyProperties(employeeDTO, employee);
        
        //设置当前记录的修改人的id和修改时间
        /*employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(BaseContext.getCurrentId());*/

        employeeMapper.update(employee);

    }

}
